And there's this ... GSP recently learned he knocked up a woman -- and he doesn't want to have a baby with her but she insists on keeping it.

After his fight on Saturday, GSP said his situation is so bad he can't sleep -- "I'm going crazy. I have issues, man. I need to relax. I need to get out for a while. I don't know what I'm going to do."

It's clear ... Georges was not himself in the ring ... something that was written all over his face after the fight.

Rogan was on at the end of O&A yesterday talking about how he thinks GSP losing time (which GSP blamed on aliens on Rogan's podcast) may be from brain injury and how in the last 3 fights he's had he has taken more hits than his previous UFC fights combined.